Where are my local package files in NuGet version 3?

In the latest version of NuGet 3, it might appear that your packages are just magically downloaded. But more precisely, where? Interestingly enough, they are stored in folders like this:

C:\Users\JaniJarvinen\AppData\Local\NuGet\v3-cache
\1ca707a4d90792ce8e42453d4e350886a0fdaa4d$ps_api.nuget.org_v3_index.json

And yes, the above filename is indeed a folder, not a file: with the .json extension and all!

Hope this helps!